The journey to sacred places is the most common way that people travel in India. They are always going on pilgrimages to sacred places. They are always undertaking spiritual journeys to visit the great shrines in the Himalayan tier of pilgrimage places; these places are called tirthas, a word that means "crossing place," a place where you can cross the river to the far shore but also cross over into another dimension of life. Cross over to heaven, in one sense it's used.

I grew up going around with family, camping and living in a very beautiful mountain valley, knowing the names of the mountains and the rivers. I think it's no accident that I ended up studying the geography of India and knowing the names of the mountains and the rivers and all of that. I loved it. I think it gives a sense of space and a can-do-ness that was very powerful.

The practice of leaving settled society to undertake a spiritual journey, or a spiritual life really, is something that is much more common in India. Common especially to a certain phase of life, to the end of life. But not so unusual for younger people as well.

My first intellectual challenge was to try to understand this incredible city of Banaras (also called Varanasi) in India and its meaning for Hindus. That was the place I lived for the first year I was in India and I've been back many times. It's a kind of home to me.

The issue of "who we are" has been an ongoing one. It's part of the ongoing identity crisis of America.

People get tired of talking about American exceptionalism, but I think this is an extraordinary thing about the United States, that we are a nation of immigrants, first of all, that is built upon a pluralistic society of native people that were here to begin with. The issue of diversity is really with us from the beginning.

Some of my best friends are Hindu or Buddhist or Sikh, my students as well. This is the sea in which I swim.